export default {
	namespaced: true, //开启命名空间
	state: () => ({
		cart: JSON.parse(uni.getStorageSync('cart') || '[]')
	}),
	mutations: {
		addToCart(state, goods) {
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if(!findResult) {
				state.cart.push(goods)
			}else {
				findResult.goods_count ++
			}
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state) {
			uni.setStorageSync('cart', JSON.stringify(state.cart))
		},
		updateGoodsState(state, goods) { //更新购物车中商品的勾选状态
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if(findResult) {
				findResult.goods_state = goods.goods_state
				this.commit('m_cart/saveToStorage')
			}
		},
		undateGoodsCount(state, goods) { //更新商品的数量
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if(findResult) {
				findResult.goods_count = goods.goods_count
				this.commit('m_cart/saveToStorage')
			}
		},
		removeGoodsById(state, goods_id) { //根据Id删除对应的商品
			state.cart = state.cart.filter(x => x.goods_id !== goods_id)
			this.commit('m_cart/saveToStorage')
		},
		updateAllGoodsState(state, newState) { //更新购物车中所有商品的勾选状态
			state.cart.forEach(x => x.goods_state = newState)
			this.commit('m_cart/saveToStorage')
		}
	},
	getters: {
		total(state) { //购物车中所有商品的总数量
			// let c = 0
			// state.cart.forEach(x => c += x.goods_count)
			// return c
			return state.cart.reduce((total, item) => total += item.goods_count, 0)
		},
		checkedCount(state) { //购物车中已勾选商品的总数量
			return state.cart.filter(x => x.goods_state).reduce((total,item) => total += item.goods_count, 0)
		},
		checkedGoodsAmout(state) { //已勾选商品的总价格
			return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count * item.goods_price, 0).toFixed(2)
		}
	}
}